Question about Rheem 40 Gallon FVR NATGAS Low WATER HEATER 6YR 22V40SF

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I have a rheem hot water tank when you turn on the hot water it comes out nice an hot but not even 30 secounds after that the water cools off and it stays as just warm water. I hear the gas kick in to heat the tank so I was wondering if maybe the stat is not working properly.

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Could be your thermostat but it might be your inlet dip tube. Your water heater has a plastic pipe that carries the cold water to the bottom of the tank. When you open your tap, it takes the hot water from the top of the tank, the cold goes to the bottem and gets heated. If this tube breaks, or comes loose, it will short circuit the cycle. The tank is hot but as soon as you start using water, cold water comes in at the top and mixes with your hot water, giving you just warm water. If you have room above your tank, you can remove the union on the cold side , screw out the pipe nipple, and look inside and see if there is a tube. If not you can buy one from home depot or lowes for just a few dollars. Also a water heater should be partially drained annually to remove any solids from the bottom, which will allow better heat transfer.If you find bits of plastic when you do, then you know where your dip tube went. Also if you've had a hot water faucet stop up and it looked like plastic there it is.

Posted on Jul 04, 2010

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Junkers manual gas hot water


What are you expecting to happen?

I assume the water heater and water inside it is cold (otherwise you would not be lighting it). You light the pilot. The main burner comes on and the pilot lights it. The main burner should stay on until the tank is hot, When the tank gets hot the main burner should shut off but the pilot stay on. If you draw hot water, cold water will run in and cool the tank. If yu do nothing the tank will eventually just cools off. then the main burner should come back on to reheat the tank.

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How long will it take Rheem solar hot water to heat up


read manual:
http://www.rheem.com.au/Assets/1294/1/Rheemsolarlolineelectric511series.pdf
Usually electric element heats about 20 gallons per hour.
It appears the element is controlled by thermostat and automatically kicks ON when tank falls below thermostat set point..
This will be handy since element will continually heat the circulating water when outside temperatures turn cool... of course it will also be wasteful if thermostat is set high.

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I have a Rheem 101 electric series circa 1997 model 101160. Water is hot in the mornings and is cold in the afternoons. This occurs even if we dont use hot water in the mornings. Have just replaced...


Maybe more than 1 problem: Suspects are: crossover, sediment or assorted gunk is built up in bottom of tank, or a loose wire or bad circuit breaker, or loose connection somewhere at water heater.
There is no off-peak setting unless you wire up the water heater differently or install a timer.

1) When water is cold, open TP valve at hot water heater to see if tank has hot water.
If tank has hot water, but it does not arrive at faucet, then suspect is crossover:
http://waterheatertimer.org/Crossover.html

2) To test if circuit breaker is problem, move wires to different circuit breaker with same amp rating:
http://waterheatertimer.org/B220C.html
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

3) Turn off power, open connection at top of heater and check that wire nuts are tight
Check all wire connections for signs of high heat and burning.

4) If bottom is filled with gunk, the lower part of heater can be slow to heat and will take so long that top part of heater will cool. Clean sediment out of tank.
http://waterheatertimer.org/How-to-clean-sediment-out-of-water-heater.html

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1 Answer

HOT WATER LAST NIGHT BUT LUKE WARM THIS EVENING? IS IT AN ELEMENT:


I assume you have electric water heater.
If tank has 2 elements, then it is 240V
If you have Rheem, then elements are 4500 watt.
Check label on side of tank for particulars.
Rheem: second two digits on serial number correspond to year of manufacture.

Ordinary tank type water heater is fully repairable by homeowner using generic parts from hardware or home center.

If you have some hot water, then that says several things:
-Upper element is working.
-Electricity from circuit breaker to upper thermostat is good.
-ECO reset button is not tripped.
-You do not have overheating event.
-Access doors and insulation are in place and thermostat not exposed to cool temperature.

That leaves following suspects:
1) Check if TP valve is stuck open and running all your hot water down a drain.
http://waterheatertimer.org/How-to-replace-TP-valve.html

2) Upper or lower thermostat is bad.
Replace both thermostats for $28
http://waterheatertimer.org/How-to-replace-thermostat-on-electric-water-heater.html

3) Lower element is bad -and- maybe tank has built-up sediment
http://waterheatertimer.org/How-to-test-water-heater-element.html
http://waterheatertimer.org/How-to-replace-water-heater-element.html

4) Wire is loose inside tank. Open covers and inspect. Tighten screws very tight against copper wire.

5) Bad wire between upper and lower sections of tank.
Do complete 30 minute troubleshoot before replacing any parts.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html

Add a comment for more free help.
Also take advantage of fixya phone service.
For a price, fixya expert speaks with you over phone while you work on water heater.
We are always less expensive than a service call.

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1 Answer

I put a new top thermastate, bottom thermastate, new top element, bottom element, on my electric 50 gal tank and didn't get hot water. Only 4years old. Bought a new GE 50 gal. tank and installed, even a...


Hi,

The next thing you need to do is find out whether you have 240v to the bottom element....the top will not heat till the bottom is satisfied...
An electric meter is critical when working with these units....trace the power and see where it stops....

here also are some tips that will help you...

Electric Water Heater Wiring Diagram
Electric Water Heater not Working
heatman101

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2 Answers

Leeking water from bottom


I wrote a page on leaking water heaters with resources and information:
Page lists things to check.
http://waterheatertimer.org/Water-at-bottom-of-water-heater.html

Also run hand over tank to find warm spot that says where leak is coming from
A rusted tank cannot be repaired.

If your tank is rusted out, it might burst open and flood the area.
Hot water inside tank is under pressure.
Turn off heat source to water heater.
Turn off water valve located above tank.
Open tub faucet on hot side and relieve pressure from tank.

You can limp along with a leaking water heater by turning it on when hot water is needed.
For example a shower uses 5-9 gallons hot water.
Turn gas water heater on for 15-20 minutes.
Turn electric on for 20-30 minutes.

To conserve resources with next heater:
http://waterheatertimer.org/9-ways-to-save-with-water-heater.html

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Hi,
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heatman101

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1 Answer

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The dip tube which carries the incoming cold water to the bottom of the tank is bad/gone. If you can find a rheem dealer you MAY be able to get a new one but it's probably time for a new water heater

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